How much for 2.5 dual exhaust on a Duster

I got the Duster back from the muffler shop today. I must say I am very pleased with the work they did and it sounds great. The X pipe, the generic flowmasters, 2 1/2 pipe all the way. It is much quieter than I expected and seems to have more power than the 2" system that this replaced. It did cost $320 and I still need some exhaust tips any recommendations? It also seems my heater core is leaking a tad. Just another challenge!